pbem game password problem

[PopskiPPA]

The game refuses my opponents (player 2) password when he tries to open turn 12. The message is "wrong password".
He can open earlier turns without problem, so I think he has not forgotten the spelling.
The files have always been sent compressed. After the problem occured I tried different compression programs, no change.
We replayed a few turns and had no problems until we came again to turn 12, his password was rejected.
I read the other thread that dealt with this problem and I don't think it is a problem of file corruption (harddisk/transfer) because it happens always at the same turn (my harddisk is checked for defects, none detected).
I cannot say for sure that we did no stupid things. It is possible that we used a slot that contained a started but not finished game, we had funny loads/quits/fails-numbers from the beginning.
I'm attaching the last few turns, so you can see that the password really changed. Password player1 argl731, player2 tobispiel
Is there a chance that we can continue this game? Maybe with the new password?